May Weather in Sai Yok, Thailand

Last updated: August 27, 2025

May in Sai Yok, Thailand is characterized by warm to hot temperatures, with a maximum reaching up to 40°C (104°F) and an average of 29°C (85°F). The evenings cool off slightly, with minimum temperatures around 23°C (73°F). This month sees a significant amount of rainfall, totaling 111 mm (4.4 in) across approximately 19 days, contributing to a high humidity level of 79%. While the rain can provide relief from the heat, visitors should be prepared for unpredictable weather and plan their activities accordingly.

May Temperature in Sai Yok

In Sai Yok, Thailand, the temperatures in May usher in the warmth of the transition to the wet season. With minimums around 23°C (73°F) and maximums peaking at 40°C (104°F), the month showcases a comfortable average of 29°C (85°F). This slight increase from April hints at a growing intensity as the region anticipates the monsoon. As the humidity rises, May’s weather draws both locals and travelers to seek relief in the lush landscapes and cool waters that surround this stunning area. The trend towards higher temperatures signals not just the change of seasons, but also the vibrant life that flourishes in the rich, green environment of Sai Yok.

May Weather in Sai Yok: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Sai Yok, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sai Yok, May typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec788185858583828181817977
Data source: Temperature data for Sai Yok generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Sai Yok

May marks a significant transition in Sai Yok, Thailand, as precipitation levels soar to 111 mm (4.4 in), nearly doubling the rainfall of April. This month is characterized by a considerable increase in rainy days, with 19 days of precipitation, setting the stage for the region's lush greenery. Following the comparatively dry months of January through March, the spring monsoon begins to assert itself, heralding the arrival of the rainy season. This trend continues into June and July, where rainfall peaks to 134 mm (5.3 in) and 135 mm (5.3 in), respectively, highlighting the intensity and longevity of the wet season. The escalating precipitation not only enriches the local ecosystem but also prepares the fertile grounds for the agricultural practices that thrive in this lush environment.

May Precipitation Trends in Sai Yok

The chart displays monthly precipitation patterns in Sai Yok, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Sai Yok, May typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec14922751111341352032141735911
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

May Humidity in Sai Yok

May marks a significant shift in humidity levels in Sai Yok, Thailand, as the humidity climbs to 79%, a notable jump from April's 69%. This seasonal transition prepares residents and visitors alike for the onset of the wet season, characterized by increasing moisture in the air. Following May, the humidity peaks further, reaching 87% in June and gradually escalating to an impressive 90% by August. This trend underscores a distinct pattern where the summer months become progressively more humid, inviting lush landscapes yet challenging outdoor activities. As the mercury rises, it's clear that Sai Yok embraces the balmy embrace of tropical humidity, which continues its grip well into the autumn months.

May Average Humidity in Sai Yok

This chart illustrates the average monthly humidity levels in Sai Yok, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Sai Yok is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec58%59%62%69%79%87%89%90%87%83%77%66%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Sai Yok

In May, Sai Yok, Thailand continues to experience a consistently extreme UV Index of 14. This high level is part of a longer trend observed since March, where the sun's intensity remains unabated, giving you just 10 minutes of safe sun exposure. Notably, this reflects a pattern seen throughout the dry season, with no significant drop in UV levels. As you enjoy the warm weather and outdoor activities, be sure to take protective measures against the relentless rays. For more detailed insights, you can check the Sai Yok UV Index.

Maximum UV Index Levels in Sai Yok for May

The chart shows the monthly maximum UV Index (UVI) for Sai Yok in May, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In May, the maximum UV index in Sai Yok typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec11121414141414141413109
Data source: Sai Yok May UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

May Sunshine in Sai Yok

In May, Sai Yok, Thailand enjoys a delightful 306 hours of sunshine, continuing a pattern of bright, warm days that starts in the earlier months of the year. Following a peak in sunshine during March at 328 hours, the hours gradually declined but still remained strong in May compared to the surrounding months. This suave balance of sunshine underscores the region's charm, making it an appealing destination as it shifts from the vibrant energy of spring into the warmth of early summer. While the sunnier days in June lower slightly to 291 hours, May stands out with its consistently bright weather, setting the stage for outdoor adventures and scenic explorations. The overall trend reflects a tropical climate that offers abundant sunlight, nurturing the lush landscapes and vibrant culture that Sai Yok is known for.

Monthly Sunshine Duration in Sai Yok: May Highlighted

The May sunshine duration represents the total number of hours Sai Yok experiences direct sunlight during the month of May, excluding cloudy or obstructed periods. This chart compares the sunshine duration of May with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec250h298h328h312h306h291h259h253h251h274h294h315h
Data source: Sai Yok May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Sai Yok During May

In Sai Yok, Thailand, the likelihood of sunny weather sees a noticeable decline as the months progress into May, with a 31% chance of sun this month. This trend becomes quite evident when looking back at April’s significantly lower 16%, suggesting that the transition into May begins to yield slightly more favorable conditions. However, compared to the earlier months, such as February (with a robust 78% chance of sunshine), May remains markedly less reliable for sunbathers and outdoor enthusiasts. Following May, the chances dip further, indicating that the wetter season is arriving, making it crucial to plan activities with the weather in mind during this transitional month.

Percentage of Sunny Days in May in Sai Yok

The chart illustrates the percentage of sunny days in Sai Yok throughout the year, with May highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Sai Yok experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec64%78%55%16%32%16%9%9%8%14%28%67%
Data source: Sai Yok May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Sai Yok in May

In Sai Yok, Thailand, the rhythm of daylight unfolds steadily throughout the year. From January to February, daylight remains consistent at 11 hours, providing a gentle transition into spring. As March arrives, daylight begins to blossom with an increase to 12 hours, a duration that lasts through the warmer months of April to August. The consistency of 12 hours creates a sense of balance during these vibrant months, ideal for outdoor exploration. As the year winds down, daylight shifts back to 11 hours by October, signaling the onset of the cooler season. This year-round variation in daylight not only enhances the natural beauty of Sai Yok but also invites residents and visitors alike to embrace the beauty of each changing season.

Average Daylight Hours in Sai Yok for May

The chart illustrates the variation in daylight duration in Sai Yok throughout the year, with May highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec11h 22m11h 40m12h 2m12h 26m12h 46m12h 56m12h 51m12h 33m12h 11m11h 47m11h 27m11h 17m
Data source: Sai Yok daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in Sai Yok

In Sai Yok, Thailand, May ushers in a gentle shift in the winds, with average speeds reaching 1.7 m/s (4 mph). This slight uptick from the previous months signals the onset of the rainy season, where breezes become a refreshing companion against the rising humidity. While January through April exhibited consistent but calmer winds, May's conditions set the stage for increased airflow leading into the more dynamic summer months. As the wind speeds gradually escalate in the following months, particularly peaking in June at 2.3 m/s (5 mph), May acts as a transitional period, hinting at the lively weather patterns to come. This blend of tranquility and anticipation makes May a unique time to experience the evolving climate in Sai Yok.

Average May Wind Speed in Sai Yok

The chart displays monthly wind speed patterns in Sai Yok, with values for each month shown alongside May's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how May's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec2.01.81.51.51.7 m/s2.32.21.91.51.41.82.2
Data source: Sai Yok May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in Sai Yok Compares to Other Months

Weather in Sai Yok varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Sai Yok, focusing on differences in temperature, rainfall, humidity, and UV levels.

May and January present strikingly contrasting weather conditions. In May, temperatures soar with a minimum of 23°C (73°F) and can reach a blistering maximum of 40°C (104°F), while the average temperature settles around 29°C (85°F). Additionally, May experiences considerable precipitation, averaging 111 mm (4.4 in) over 19 days, accompanied by high humidity levels of 79%. In contrast, January offers much cooler temperatures, with a minimum of 13°C (56°F) and a maximum of 37°C (99°F), averaging 25°C (78°F). Rainfall is minimal during this month, totaling only 14 mm (0.6 in) over just 3 days, and the humidity is lower at 58%. For more details on January weather, visit Sai Yok weather in January.

In comparing the weather between May and February, we see a significant contrast in both temperature and precipitation. May boasts a minimum temperature of 23°C (73°F) and an average high of 29°C (85°F), with extremes reaching up to 40°C (104°F). The humidity is notably high at 79%, accompanied by substantial rainfall totaling 111 mm (4.4 in) over 19 days, making it a wet and muggy month.

In contrast, February has a milder climate, with temperatures ranging from a minimum of 17°C (62°F) to an average high of 27°C (81°F), peaking at 37°C (99°F). Precipitation is minimal, with just 9 mm (0.3 in) over 3 days and lower humidity at 59%. This makes February a drier and more comfortable month for outdoor activities, as highlighted in Sai Yok weather in February.

May and March present notable differences in weather conditions, despite sharing similar average temperatures. May typically experiences higher humidity levels at 79%, contributing to a more oppressive atmosphere, while March boasts a lower humidity of 62%, making it feel less muggy. In terms of precipitation, May is significantly wetter, with 111 mm (4.4 in) of rain spread over 19 days, compared to March's mere 22 mm (0.9 in) over only 3 days. This difference not only affects outdoor activities but also the overall comfort level during these months. For a detailed look at March weather in Sai Yok, you can refer to Sai Yok weather in March.

In comparing the weather conditions of April and May, we see some notable differences. April boasts slightly warmer temperatures, with an average of 30°C (86°F) and a maximum reaching 41°C (106°F), compared to May's average of 29°C (85°F) and max of 40°C (104°F). However, May experiences significantly higher precipitation, totaling 111 mm (4.4 in) over 19 days, while April’s rainfall is less, at 75 mm (2.9 in) across 14 days. Additionally, the humidity in May is higher at 79%, compared to April's 69%. For more details on April weather, check out Sai Yok weather in April.

In comparing the weather of May and June, both months experience warm temperatures, with May having a slightly higher average temperature of 29°C (85°F) compared to June's 28°C (83°F). However, June sees a slight increase in humidity at 87%, compared to May's 79%. Precipitation also rises in June, totaling 134 mm (5.3 in) over 21 days, while May records 111 mm (4.4 in) over 19 days. For more detailed insights on the weather conditions, you can check Sai Yok weather in June.

May and July present distinct weather patterns, highlighting the transition into the peak of the rainy season. In May, temperatures range from a minimum of 23°C (73°F) to a maximum of 40°C (104°F), with an average temperature of 29°C (85°F). The month experiences considerable rainfall, totaling 111 mm (4.4 in) over 19 days, along with a humidity level of 79%. In contrast, July features slightly cooler temperatures, boasting a minimum of 23°C (74°F) and a maximum of 35°C (96°F), with an average temperature of 28°C (82°F). Rainfall increases in July, reaching 135 mm (5.3 in) over 22 days, along with a higher humidity of 89%. For more detailed information, you can visit Sai Yok weather in July.

In May, the weather presents a hot and humid atmosphere with temperatures ranging from a minimum of 23°C (73°F) to a scorching maximum of 40°C (104°F), averaging around 29°C (85°F). The month experiences significant precipitation, totaling 111 mm (4.4 in) over 19 days, with humidity levels at 79%. In contrast, August is cooler, with temperatures ranging from a minimum of 23°C (74°F) to a maximum of 35°C (96°F), and an average temperature of 27°C (81°F). However, August sees increased rainfall, with 202 mm (8.0 in) spread across 25 days and a higher humidity level of 90%. For more detailed information, you can refer to Sai Yok weather in August.

In May, temperatures range from a minimum of 23°C (73°F) to a maximum of 40°C (104°F), with an average of 29°C (85°F). The month experiences significant rainfall, totaling 111 mm (4.4 in) over 19 days, coupled with a humidity level of 79%. In contrast, September offers slightly cooler temperatures, with a minimum of 23°C (73°F) and a maximum of 37°C (98°F), averaging around 27°C (81°F). However, this month is wetter, receiving 214 mm (8.4 in) of precipitation over 23 days, while humidity rises to 87%. For more details on September weather conditions, check out Sai Yok weather in September.

May and October present distinct weather characteristics, reflecting the transition from spring to autumn. In May, temperatures are notably higher, with a minimum of 23°C (73°F) and an average of 29°C (85°F), rising to a scorching maximum of 40°C (104°F). This month sees significant rainfall, accumulating 111 mm (4.4 in) across 19 days, alongside a humidity level of 79%. In contrast, October offers milder temperatures, with a minimum of 21°C (70°F) and an average of 27°C (81°F), peaking at 34°C (94°F). The precipitation is greater in October, totaling 173 mm (6.8 in) over 20 days, and humidity increases slightly to 83%. For more detailed insights, you can check out Sai Yok weather in October.

May weather is characterized by hotter temperatures, with minimums reaching 23°C (73°F) and averages around 29°C (85°F). This month experiences significant rainfall, totaling 111 mm (4.4 in) over 19 days, alongside relatively high humidity levels at 79%. In contrast, November offers a more moderate climate, with minimum temperatures of 18°C (65°F) and average highs of 26°C (79°F). Precipitation decreases to 59 mm (2.3 in) spread over just 10 days, and humidity is slightly lower at 77%. For a more detailed look at November conditions, check out Sai Yok weather in November.

In comparing the weather between May and December, it’s evident that May is characterized by significantly higher temperatures and higher humidity. With minimum temperatures around 23°C (73°F) and maximums soaring to 40°C (104°F), May averages a sizzling 29°C (85°F). In contrast, December experiences a cooler climate, with minimum temperatures dropping to 14°C (58°F) and a maximum of 35°C (94°F), resulting in a pleasant average of 25°C (77°F). Additionally, May sees a substantial amount of rainfall, with 111 mm (4.4 in) falling over 19 days, while December is much drier, recording only 11 mm (0.4 in) over just 2 days. This reduction in precipitation is accompanied by a dip in humidity to 66%, making December a more comfortable month overall. For further details on December weather, check out this link: Sai Yok weather in December.

Compare Sai Yok's Climate with Cities Worldwide

Conclusion: What to Expect From May Weather in Sai Yok

As May unfolds in Sai Yok, it brings a shift in weather dynamics that sets it apart from the earlier months of the year. With temperatures peaking at a blazing 40°C (104°F), the heat is accompanied by increased humidity, averaging around 79%, creating a muggy atmosphere. This month is also marked by significant rainfall, totaling 111 mm (4.4 in) over about 19 days, which is notably higher than the drier preceding months. The combination of warmth and frequent showers transforms the landscape, making it lush but also challenging for outdoor activities. For those planning a visit or looking to understand the seasonal changes, you can find more detailed insights at Sai Yok Climate.